CN1226814A - Absorbent structure, and production thereof by mat formation together with adhesive-bonded layer - Google Patents

Absorbent structure, and production thereof by mat formation together with adhesive-bonded layer Download PDF

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Publication number
CN1226814A
CN1226814A CN97196967A CN97196967A CN1226814A CN 1226814 A CN1226814 A CN 1226814A CN 97196967 A CN97196967 A CN 97196967A CN 97196967 A CN97196967 A CN 97196967A CN 1226814 A CN1226814 A CN 1226814A
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airlaid
absorbing
layers
absorbing structure
airlaid material
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Chinese (zh)
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B·罗瑟兰德
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Essity Hygiene and Health AB
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SCA Molnlycke AB
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A61F13/15642—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres by depositing continuous layers or pads of fibrous material on single sheets or webs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/539—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/593—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives to layered webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2555/00—Personal care

Abstract

Absorbent structure (1) consisting of an absorbent material layer (2) of adhesive-free cellulose fibres (4) and an airlaid material layer (3) of adhesive-bonded cellulose fibres (5), and a method for producing an absorbent structure (1) which is intended for use in an absorbent article. The layers are bonded together by means of the adhesive of the airlaid material (3) functioning as a binding material and fibres (4) from the absorbent material layer (2) extending into the airlaid material (3). In the method, the absorbent material (2) is mat-formed on an airlaid material (3). Alternatively, the absorbent material (2) is mat-formed and an airlaid material (13) is then laid on top of it. After the material layers have been laid together, they are compressed (24) at a temperature in excess of 100 DEG C. During the compression (24), the adhesive of the airlaid material is softened, and the two layers are bonded together. Some of the fibres (4) from the absorption material (2) also penetrate down into the airlaid material (3) and further connection between the layers is achieved.

Description

Absorbing structure and by form with the binding agent adhesive linkage pad produce this absorbing structure method
Background technology
The present invention relates to the absorbing structure that layers of absorbent material and airlaid material layer are formed, relate to the absorbing structure that is used for producing as absorbent articles such as absorbent article such as sanitary towel, pantiliner, incontinence pad, diaper, binder, saliva absorbing components simultaneously.
Above-mentioned this class absorbent product has all designs as everyone knows.Absorber in this series products can by cellulose pulp for example produce roll up, bag or sheet form, the drying fiber separation is handled, with fluffy formal transformation is pulp mat, sometimes mix with so-called superabsorbent fibers, the latter is that some can absorb the water that is equivalent to himself weight several times or the polymer of body fluid.
Above-mentioned paper pulp body often is compressed, and this is in order to improve the ability that its scatters liquid on the one hand, be on the other hand for the volume that reduces paper pulp to obtain fine and close as far as possible product.
This series products is of paramount importance to be that they should have the material that high absorbability, their whole absorbabilities are wanted to realize fully, they are included and can scatter the liquid that is absorbed fully, and this class product also should be thinned to and can independently as much as possible use.
Swedish patent file SE, B, 462622 have described a kind of product that comprises the cellulose fibrous material that can separate fast, and intensity that this series products had can rolling or is processed into sheet form so that store and transportation, does not need to add between fiber the chemical compound that improves its bond strength.It is that the flash drying fiber of so-called CTMP forms fabric by about 80% dry-matter content with a kind of paper pulp of chemical thermodynamics.Described fiber is carried by the air-flow of controlled flow by the forming head that is located on the metal gauze.Above-mentioned air is drawn through the gettering container that is located under this silk screen.This fabric is 550～1000kg/m finally being pressed into density 3Pass through precompressed, to reduce the volume of this fabric before.After this kind product is easy to the drying fiber separation, be transformed into nappy form, be used for producing for example hygienic articles of diaper, sanitary towel and similar products.The advantage of this material is, the cellulose pulp of rolling becomes fabric through flash drying and dry forming, thereby the content of the adhesive for paper of this paper pulp is low, forms the used energy of paper pulp thereby make the energy of fiber separation be lower than traditional fabric.So also just this material might be pressed into strong form, the volume when particularly reducing to store and transport, or the like, and keep simultaneously the energy of very low fiber separation.Another advantage is superabsorbent fibers can be sneaked in this dry material that forms, and this then is impossible to the material that wet method forms.
Find that also this being in without the material of the dry forming under the fiber separation state is a kind of material of highly absorbable, this material can without fiber separation just can be directly as the absorption material in the hygienic articles.The above results is disclosed among Swedish patent file SE9203445-3-5, the SE9203446-1.This material also has good distribution character and swelling properties, can realize easier with cheap production process, and does not need common fiber separation and become pad to handle.In the application of some product of hygienic articles, before absorbing material, softening, be favourable to the rolling paper pulp of dry forming.Mentioned good absorption character and swelling properties then can not be subjected to any appreciable impact of above-mentioned softening processing.
Many absorption products are arranged, and wherein the overwhelming majority is thin sanitary towel and pantiliner, and be to make with so-called airlaid material their now.This material is produced through the cellulose fibre of air lay by for example be coated with adhesive such as latex on metal gauze.Such airlaid material has just become the adherent material of binding agent, and then dry in baker.
A kind of pantiliner just includes airlaid material, plastics for example poly bottom bottom and for example non-woven upper surface layer of monolayer.In sanitary towel, this airlaid material then is converted into three layers; Perhaps identical with this pantiliner, also comprise plastic bottom bottom and upper surface layer.This kind airlaid material for example has mitten, shawl, napkin and the tablecloth of screening glass, washing usefulness in other Application for Field.
The absorbing material utmost point of above-mentioned dry forming is suitable in the hygienic articles, and this is because this kind material has good absorbent properties.In addition, it does not have binding agent, and this considers it also is favourable from expense and environmental protection.But but exist inelastic and brittle shortcoming, thereby if just can not keep together well when this material layer is too thin.Particularly when the production feminine hygiene, it is advantageous making absorbing material have narrow fabric width on roller or bobbin.For (wide about 5～10cm) go up the material of supplying with dry forming, and this material must have about 350g/m at narrow roller with required intensity 2The gram number.This gram number is higher than the required gram number of product function itself under many situations.
Purpose of the present invention promptly is to reduce to be had for supplying to narrow roller (the gram number of the hygroscopic material of the dry forming of wide about 5～10cm) desirable strengths.
Summary of the invention
Hereinafter we are called absorbing material to the absorbing material of dry forming, simultaneously the adherent airlaid material of binding agent are called airlaid material (referring to the definition among the EDANA).
One aspect of the present invention relates to the article of the absorbing structure that comprises layers of absorbent material and airlaid material, and another aspect relates to the method that is used for producing absorbing structure.
Like this, this kind absorbing structure just comprises layers of absorbent material and airlaid material layer.This absorbing material comprises the cellulose fibre of adhesive-free, and this airlaid material comprises the adherent cellulose fibre of binding agent.The airlaid material layer plays the effect that strengthens with the supporting layers of absorbent material.More than the binding agent of the airlaid material of each layer by playing the jointing material effect bonding mutually.By the fiber that stretches into the airlaid material layer from layers of absorbent material, also can obtain to a certain degree in conjunction with effect.
In the method for producing this absorbing structure, be that above-mentioned absorbing material and airlaid material are used together, back one material has good intensity and elasticity.The one-tenth pad of this absorbing material is to carry out on the airlaid material of directly formerly producing.Perhaps, make absorbing material on metal gauze, become pad earlier, airlaid material is layed on the top of absorbing material then.After becoming pad this structure is compressed, promptly above on 100 ℃ the temperature absorbing material is being pressed to airlaid material, at this moment the binding agent of airlaid material is softening and this is two-layer bonding mutually.Fiber from absorbing material stretches into downwards in the airlaid material, further strengthened being connected between absorbing material and airlaid material.This airlaid material plays the effect of the supporting member and the enhancement layer of absorbing material.The enhancing of absorbing material and supporting role mean can produce thin absorbing material.
Brief description of the drawings
Fig. 1 shows bright absorbing structure with layers of absorbent material, above then by bonding this airlaid material layer of going up of the binding agent of airlaid material.Some fiber of layers of absorbent material stretches in the airlaid material layer.This figure does not draw in proportion;
Fig. 2 shows that bright absorbing structure has layer of absorbent layer and two-layer-at the top with in the airlaid material of bottom.These three layers all is that binding agent by airlaid material is bonded together.Some fiber in this layers of absorbent material then stretches in the airlaid material on top.This figure does not draw in proportion;
Fig. 3 and 4 has shown that this absorbing structure is arranged in the goods according to the illustrative arrangement of the illustrative embodiment of a kind of absorbing structure of the present invention.These two figure do not draw in proportion;
Fig. 5 and 6 shows a kind of production process of absorbing structure.
The detailed description of invention
Absorbing structure of the present invention comprises a layers of absorbent material that approaches that is strengthened and supported by the airlaid material layer.This airlaid material layer be by become at the metal gauze overdraught net and this be coated with on the net binding agent for example the cellulose fibre of latex generate that is be bonded.Then that this material is dry in baker.If this cellulose fibre is from bleaching compounds paper pulp commonly used now, then this material is white.The percentage elongation of airlaid material is 10～20%, then have an appointment 1.5% percentage elongation of the absorbing material that is complementary therewith.
Absorbing structure 1 of the present invention comprises the absorbing material 2 with adhesive-free cellulose fibre 4 as described in Figure 1 and has the airlaid material 3 of the adherent fiber 5 of binding agent.This airlaid material layer 3 is arranged on the top of layers of absorbent material 2 at this.In a kind of production method, this airlaid material layer will belong to the bottom, and absorbing material then is formed on the top of airlaid material.Airlaid material 3 is bonded together by the binding agent with the two-layer airlaid material that is secured together 3 mutually with absorbing material 2, the fiber 4 by layers of absorbent material 2 extend into also strengthened to a certain extent in the airlaid material layer 3 this bonding.Airlaid material 3 plays the effect of the reinforcement and the supporting member of absorbing material 2.The density of absorbing material is 0.1～1.0g/cm 2, 0.2～0.95g/cm particularly 2, better be 0.25～0.9g/cm 2, and 0.3～0.85g/cm preferably 2, and the gram number is 50～250g/m 2, better be 75～200g/m 2And 100～150g/m preferably 2The gram number of airlaid material is 30～100g/m 2, better be 35～80g/m 2, and 35～50g/m preferably 2The result has obtained having good absorption and high-intensity thin absorbing structure.About 85～the 200g/m of gram number that this kind structure is total 2, existing the gram number by the absorbing structure that absorbing material constitutes then has 350g/m 2
Cellulose fibre in the absorbing material for example comprises the flash drying fiber of chemical thermodynamics paper pulp CTMP.Other fiber that can be used for this absorbing material for example has the fiber from thermodynamics paper pulp CMP, high-temperature thermodynamics paper pulp HTCTMP, sulfite pulp and kraft pulp.
Another kind of absorbing structure 6 of the present invention is shown in Fig. 2.Above-mentioned each layer in pie graph 1 structure, the side also has an airlaid material layer 7 under layers of absorbent material, and the gram number of this one-tenth web material layer is 30～100g/m 2, better be 35～80g/m 2And 35～50g/m preferably 2
The production process of absorbing structure 1 of the present invention is shown in Fig. 5.Absorbing material 2 directly becomes to fill up on airlaid material layer 3.Airlaid material 3 is layed on the metal gauze 26, and absorbing material 2 is formed by the CTMP flash drying fiber of for example intending being used to form in absorbing material pad 24.At this moment fiber 4 is to be carried through being located at the forming head 21 on the wire netting 26 by a controlled air flow 20.Wire netting 26 has exhaust chamber 22, and it siphons away air, above-mentioned CTMP fiber 4 just inhale downwards and wherein some just stretch in the airlaid material 3.Importantly to make airlaid material 3 be porous matter and allowed air to pass through, this is because the gettering container 22 that is located under the metal gauze must siphon away the air that transports CTMP fiber 4.Behind the compression stage through carrying out under high pressure and the heating condition pad.Compression unit 24 comprises that two temperature are higher than 100 ℃ roller 25, and the latex adhesive of this moment is softened, and with this two-layer being bonded together.Owing to have airlaid material to strengthen and the result who supports absorbing material, just can obtain thin absorbing structure.After this compression, the density that above-mentioned absorbing material has is 0.1～1g/cm 3, this has provided the thin product with good absorption.This absorbing material proper density is 0.1～1.0g/cm 3, 0.2～0.95g/cm particularly 3, be more preferably 0.25～0.9g/cm 3, and 0.3～0.85g/cm preferably 3The one-tenth pad stage at this absorbed layer can also increase superabsorbent fibers.
Fig. 6 shows bright another kind of preparation method of the present invention.Absorbing material 2 is to become pad on metal gauze 26 at this.The operation that becomes pad is to carry out according to mode same as described above, it is with the different of preceding method, airlaid material 13 is not to be layered on the silk screen but to be layed on the layers of absorbent material 2 after reality becomes pad, in other words, being is before the compression stage of compression unit 24 still after forming head 21 and gettering container 22.This compression under high pressure is heated on 100 ℃ to be carried out.Latex adhesive is softened and with this two-layer being bonded together.This absorbing material is strengthened and supporting by airlaid material once more at this.The porous of airlaid material at this moment and to have a requirement of very low gram number just so unimportant is drawn through this airlaid material because will not have air.
At this moment airlaid material can be according to the several 35～50g/cm of gram 2Produce.Interrelate therewith, just can make the gram number of absorbing material be low to moderate about 50～150g/m 2,, just can obtain to be supplied in the product of narrow roller again by the intensity of this airlaid material.So just provided about 85～200g/m 2Total gram number, former then is 350g/m 2, this is needed when singly using absorbing material.This kind absorbing structure is cut into narrower amplitude after producing, this is illustrated.
So far obtained to have the product of the absorbing material of good absorption characteristic and dispersion characteristic, and this material can be strengthened by the intensity of airlaid material.This product is thinner than the absorption pad of previous dry forming, and this just can be advantageously used in the low sanitary towel of number and the situation of pantiliner of restraining that require.It also can be used for for example diaper certainly.Another advantage is the quantity that has reduced binding agent, just contains binding agent in this just thin airlaid material.
In another kind of production method, can be with two-layer airlaid material 3 and 13 and inhale adiabator layer 2 and combine.Earlier with one deck airlaid material 3 by in the past with reference to being formed with on the silk screen 26 of hygroscopic material 2 above figure 5 described being layed in.Before being right after compression stage 24, another airlaid material layer 13 is routed on the top of this layers of absorbent material 2 then, this is based on production method shown in Figure 6.This production process with aforesaid identical, has so further strengthened absorbing structure in others, and has reduced the fluffing of fiber when producing for example pantiliner and sanitary towel.In the production process of absorption product, can the fiber that make troubles be loose from absorbing material unclamp selectively with this material softening.Then can not fluff by latex bonded air lay material section layer, thereby can play the effect of block piece.
Above-mentioned absorbing material also can be formed by the fiber from thermodynamics paper pulp CMP, high-temperature thermodynamics paper pulp HTCTMP, sulfite pulp or kraft pulp.
When not using the CTMP fiber of stratified flash drying, can be by the common one-tenth pad operation formation hygroscopic material bed of material.In common one-tenth pad operation, the paper pulp of getting lamellar, web-like or packetized form has passed through dry defibre or has torn processing.The fiber of loose fine hair form is blown out discrete form then downwards and is blown off on a width of cloth fabric.
When producing diaper, utilize the discrete form that has the porous bottom, the airlaid material layer is arranged on this bottom, and fiber then is transported down into shaped segment.Utilization is carried out to pad and compression in the mode of the air of bottom place sucking-off.
The present invention also has other various advantages.Aforementioned absorbing material is so-called CTMP production with chemical thermodynamics paper pulp.Still have lignin in the fiber therein, that is to say that fiber remains hard and have yellow color.Airlaid material then is white, and it can give the whiter and brighter surface of this absorbing structure.This helps some product of not wishing to have yellow surfaces, because this can reduce its captivation under some situation.Such absorbing material only need add liquid-tight bottom just can be used as absorbing structure.
Compare with the absorbing material of percentage elongation about 1.5%, the percentage elongation of airlaid material is about 10～20%.This bigger percentage elongation of airlaid material also just makes it that higher intensity can be arranged.Such intensity and pliability have shown that this airlaid material is can strengthen and the absorbing material that supports dry forming.
The advantage of dry forming absorbing material is to mix superabsorbent fibers therein.Superabsorbent fibers can be included in this absorbing structure and with absorbing material and mix.At this moment airlaid material just plays the effect on barrier layer to superabsorbent fibers, both in the production process of absorbing structure, also this absorbing structure is being used for absorbent article.In process of production, the airlaid material layer is layed on the metal gauze under fiber and superabsorbent fibers, has prevented that superabsorbent fibers is through the layers of absorbent material sucking-off.In the application of absorbing structure, if the airlaid material layer is put into the effect that just can play the barrier layer on the layers of absorbent material.Like this, inhale when liquid is arranged with superabsorbent fibers, can prevent that superabsorbent fibers from moving towards user at absorber.
When above-mentioned product is used for some hygienic articles, hygroscopic material is handled before using through softening.Aforesaid good absorption character, spreading character and swelling properties are to be subjected to this softening appreciable impact of handling.Remollescent method is included between the roller processing, ultrasonic softening, damp softening or to add chemical addition agent softening.
Illustrative embodiment
Fig. 3 shows the embodiment of the absorbing structure 1 of sanitary towel's form, and it comprises airlaid material 3 and absorbing material 2, and this airlaid material is connected by the binding agent in the airlaid material with absorbing material and fixes each other.Also can realize this connection by the fiber 4 that stretches into the absorbing material in the airlaid material.One liquid-tight for example non-woven is arranged at the top of this absorbing structure, in use towards the upper strata 8 of using, for example liquid-tight bottom 9 of polyethylene system is arranged then in the bottom.Layer 8 all partly extends to outside this absorbing structure 1 and on extended part with layer 9 and mutually combines.
Another illustrative embodiment is shown in Fig. 4, the airlaid material layer 3 of absorbing structure 6 wherein on the top that is layed in layers of absorbent material 2, also is provided with airlaid material layer 7 in addition under layers of absorbent material 2.Be provided with at the top of this absorbing structure in use towards for example non-woven liquid-tight upper strata 8 of user, then be provided with for example poly liquid-tight bottom 9 in the bottom.
Illustrative embodiment shown in the present invention is not limited to, and the present invention also can be in other embodiment.

Claims (19)

1. absorbing structure; for example be used among diaper, sanitary towel, pantiliner, incontinence pad, the bed guard member etc.; it is characterized in that; this absorbing structure comprises the layers of absorbent material (2) of cellulose fibre (4) of adhesive-free and the airlaid material of one deck at least (3) of the adherent cellulose fibre of binding agent (5), and these layers then interconnect.
2. absorbing structure as claimed in claim 1 is characterized in that, airlaid material (3) and absorbing material (2) are that the binding agent with airlaid material interconnects.
3. absorbing structure as claimed in claim 2 is characterized in that, airlaid material (3) and absorbing material (2) also stretch in the airlaid material (3) by some cellulose fibre (4) of absorbing material (2) and interconnect.
4. as claim 2 or 3 described absorbing structures, it is characterized in that absorbing material comprises the also flash drying fiber (4) of dry stratified CTMP.
5. absorbing structure as claimed in claim 4 is characterized in that, the wide about 5～10cm of this absorbing structure, preferably about 7cm.
6. absorbing structure as claimed in claim 5 is characterized in that, the gram number that airlaid material (3) has is 30～100g/m 2, be more preferably 35～80g/m 2, 35～50g/m preferably 2
7. absorbing structure as claimed in claim 6 is characterized in that, the gram number that layers of absorbent material (2) has is 50～250g/m 2, be more preferably 75～200g/m 2, 100～150g/m preferably 2
8. absorbing structure as claimed in claim 7 is characterized in that, the density that absorbing material (2) has is 0.1～1.0g/cm 3, 0.2～0.95g/cm particularly 3, be more preferably 0.25～0.9g/cm 3, and 0.3～0.85g/cm preferably 3
9. method that is used for the absorbing structure (1) among Production Example such as diaper, sanitary towel, pantiliner, incontinence pad, bed guard member etc.; it is characterized in that; the layers of absorbent material (2) of adhesive-free cellulose fibre (4) the airlaid material layer (3) with the adherent cellulose fibre of binding agent (5) is routed to, uses compressor (24) compression then.
10. method as claimed in claim 9 is characterized in that, above-mentioned compression is to carry out being higher than under 100 ℃ the temperature.
11. method as claimed in claim 10 is characterized in that, absorbing material (2) is directly to become pad on airlaid material (3), and with airlaid material (3) as supporting.
12. method as claimed in claim 11, it is characterized in that, absorbing material (2) is to become pad by the CTMP flash drying fiber of intending being formed in the layer (2) (4), fiber (4) is carried by the air-flow (20) with controlled form, by the top set forming head (21) in metal gauze (26) top that is equipped with airlaid material layer (3).
13. method as claimed in claim 12 is characterized in that, is provided with gettering container (22) under the metal gauze (26), with the air sucking-off, CTMP fiber (4) is attracted to down and stretches among the airlaid material (3).
14. method as claimed in claim 10, it is characterized in that, absorbing material (2) is to become pad by the flash drying fiber (4) of intending being formed into the CTMP in the layer (2) on metal gauze (26), fiber (4) is carried by being located at the forming head (21) on the metal gauze (26) by the air-flow (4) with controlled form, becomes net materials (13) in upper berth, top bleed flow then.
15. method as claimed in claim 14 is characterized in that, metal gauze (26) has the gettering container (22) that is used for the air extraction, and CTMP fiber (4) is inhaled down to silk screen (26).
16. method as claimed in claim 13 is characterized in that, at compression stage (24) before, a second layer airlaid material layer (13) is layed on the top of layers of absorbent material (2).
17. any as described above described method of claim is characterized in that it is 30～100g/m that described airlaid material has the gram number 2, be more preferably 35～80g/m 2, and 35～50g/m preferably 2
18. any as described above described method of claim is characterized in that the gram number of layers of absorbent material is 50～250g/m 2, be more preferably 75～200g/m 2, and 100～150g/m preferably 2
19. any as described above described method of claim is characterized in that the density that layers of absorbent material has is 0.1～1.0g/cm 3, 0.2～0.95g/cm particularly 3, be more preferably 0.25～0.9g/cm 3, and 0.3～0.85g/cm preferably 3
CN97196967A 1996-05-31 1997-05-23 Absorbent structure, and production thereof by mat formation together with adhesive-bonded layer Pending CN1226814A (en)

Applications Claiming Priority (2)

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SE9602154A SE510901C2 (en) 1996-05-31 1996-05-31 Absorbent structure and production of absorbent structure by mat formation together with adhesive bonded layers
SE96021548 1996-05-31

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CN1226814A true CN1226814A (en) 1999-08-25

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EP (1) EP0921776B2 (en)
JP (1) JP2000511833A (en)
KR (1) KR20000016200A (en)
CN (1) CN1226814A (en)
AU (1) AU718589B2 (en)
BR (1) BR9709388A (en)
CO (1) CO4850616A1 (en)
CZ (1) CZ385698A3 (en)
DE (1) DE69710590T3 (en)
ES (1) ES2173451T5 (en)
NZ (1) NZ333104A (en)
PL (1) PL187774B1 (en)
RU (1) RU2203011C2 (en)
SE (1) SE510901C2 (en)
SK (1) SK163898A3 (en)
TN (1) TNSN97095A1 (en)
TR (1) TR199802451T2 (en)
WO (1) WO1997045083A1 (en)
ZA (1) ZA974335B (en)

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CN106456416A (en) * 2014-06-03 2017-02-22 宝洁公司 Absorbent element for disposable absorbent articles having an integrated acquisition layer
CN107981987A (en) * 2016-10-26 2018-05-04 山东太阳生活用纸有限公司 Absorbent article core and its manufacture method and absorbent article

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CN106456416A (en) * 2014-06-03 2017-02-22 宝洁公司 Absorbent element for disposable absorbent articles having an integrated acquisition layer
CN106456416B (en) * 2014-06-03 2020-01-21 宝洁公司 Absorbent element for disposable absorbent article with integrated acquisition layer
WO2016183242A1 (en) 2015-05-12 2016-11-17 3M Innovative Properties Company Moisture absorption piece, moisture absorption bag, and preparation method and use thereof
CN107981987A (en) * 2016-10-26 2018-05-04 山东太阳生活用纸有限公司 Absorbent article core and its manufacture method and absorbent article

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SE9602154L (en) 1997-12-01
EP0921776A1 (en) 1999-06-16
DE69710590T2 (en) 2002-08-22
SK163898A3 (en) 1999-06-11
TNSN97095A1 (en) 1999-12-31
KR20000016200A (en) 2000-03-25
TR199802451T2 (en) 1999-02-22
CZ385698A3 (en) 1999-02-17
AU718589B2 (en) 2000-04-13
SE510901C2 (en) 1999-07-05
NZ333104A (en) 2000-01-28
AU3110897A (en) 1998-01-05
DE69710590D1 (en) 2002-03-28
CO4850616A1 (en) 1999-10-26
ES2173451T5 (en) 2005-12-16
SE9602154D0 (en) 1996-05-31
EP0921776B2 (en) 2005-06-29
US6127594A (en) 2000-10-03
JP2000511833A (en) 2000-09-12
BR9709388A (en) 2000-01-11
PL330232A1 (en) 1999-05-10
RU2203011C2 (en) 2003-04-27
EP0921776B1 (en) 2002-02-20
WO1997045083A1 (en) 1997-12-04
ES2173451T3 (en) 2002-10-16
PL187774B1 (en) 2004-10-29
DE69710590T3 (en) 2005-12-29
ZA974335B (en) 1998-01-23

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